National Aeronautics and Space Administration Water Vapor Project (NVAP)

As of May 2004 this data has been updated. See below

REFERENCES:

Randel, David L., Thomas J. Greenwald, Thomas H. Vonder Haar, Graeme L. Stephens, Mark A. Ringerud, Cynthia L. Combs, 1996: A New Global Water Vapor Dataset. Bulletin of the American Meteorological Society, 77, No. 6, pp. 1233-1254.

NVAP CIRA home page: www.cira.colostate.edu/climate/NVAP/NVAPCIRA.HTM

SOURCE: NASA (via CIRA, courtesy Dave Randel)

FORMAT: NetCDF

GRID:   Global - 1 x 1 degree grid
        Global - T63 (96 x 192) grid

LEVELS: Total Column

FIELDS: Description                     Name    Units   Levels
        --------------------------------------------------------------
	Precipitable Water		PWAT 	mm     total column	

TIMES: DAILY:  365 values per year (366 in leap years).
       MONTHLY:  12 values per year
       MONTHLY-MEAN: 12 values (climatological)

Current holdings: January 1988 - Dec 1996 


MSS Directories: /CA/NVAP/DAILY
                 /CA/NVAP/MONTHLY
                 /CA/NVAP/MONMEAN


Filenames: NVAP.PWAT.daily.yy.nc  (original 1 x 1 grid)
           NVAP.PWAT.daily.T63.yy.nc
           NVAP.PWAT.monthly.T63.yy.nc
           where "yy" is the 2-digit year, and
           NVAP.PWAT.monmean.T63.8896.nc

------------------------------------------------------------------
May 2004 update
Current holdings: January 1988 - Dec 1999


MSS Directories: /CA/NVAP/NEW


Filenames: NVAP.PWAT.monthly.yy.nc  (original 1 x 1 grid)
           NVAP.PWAT.monthly.T63.yy.nc

for all 12 years:   
           NVAP.PWAT.monthly.88-99.nc (original 1 x 1 grid)
           NVAP.PWAT.monthly.T63.88-99.nc

Note: These updated T63 files were generated using bilinear interpolation.


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